# Copyright (c) 2013, Brian Shirai
# All rights reserved.
# 
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are met:
# 
# 1. Redistributions of source code must retain the above copyright notice, this
#    list of conditions and the following disclaimer.
# 2. Redistributions in binary form must reproduce the above copyright notice,
#    this list of conditions and the following disclaimer in the documentation
#    and/or other materials provided with the distribution.
# 3. Neither the name of the library nor the names of its contributors may be
#    used to endorse or promote products derived from this software without
#    specific prior written permission.
# 
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
# AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
# DISCLAIMED. IN NO EVENT SHALL <COPYRIGHT HOLDER> BE LIABLE FOR ANY DIRECT,
# INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
# BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
# OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
# NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE,
# EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

module Truffle
  module Socket
    module Foreign
      class Hostent < Truffle::FFI::Struct
        config('platform.hostent', :h_name, :h_aliases, :h_addrtype,
               :h_length, :h_addr_list)

        def hostname
          self[:h_name]
        end

        def type
          self[:h_addrtype]
        end

        def aliases
          return [] if self[:h_aliases].null?

          Truffle::Socket::Foreign.pointers_of_type(self[:h_aliases], :string)
            .map(&:read_string)
        end

        def addresses
          return [] if self[:h_addr_list].null?

          Truffle::Socket::Foreign.pointers_of_type(self[:h_addr_list], :string)
            .map { |pointer| pointer.read_string(self[:h_length]) }
        end

        def to_s
          pointer.read_string(size)
        end
      end
    end
  end
end
